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Characterization of the inter-annual, seasonal, and diurnal variations of condensation particle concentrations at Neumayer, Antarctica

Weller, Rolf and Minikin, Andreas and Wagenbach, Dietmar and Dreiling, Volker (2011) Characterization of the inter-annual, seasonal, and diurnal variations of condensation particle concentrations at Neumayer, Antarctica. Atmospheric Chemistry and Physics, 11, pp. 13243-13257. DOI: 10.5194/acp-11-13243-2011.

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Official URL: http://www.atmos-chem-phys.net/11/13243/2011/acp-11-13243-2011.html

Abstract

Continuous condensation particle (CP) observations were conducted from 1984 through 2009 at Neumayer Station under stringent contamination control. During this period, the CP concentration (median 258 cmâ��3) showed no significant long term trend but exhibited a pronounced seasonality characterized by a stepwise increase starting in September and reaching its annual maximum of around 103 cmâ��3 in March. Minimum values below 102 cmâ��3 were observed during June/July. Dedicated time series analyses in the time and frequency domain revealed no significant correlations between inter-annual CP concentration variations and atmospheric circulation indices like Southern Annular Mode (SAM) or Southern Ocean Index (SOI). The impact of the Pinatubo volcanic eruption and strong El Ni�±o events did not affect CP concentrations. From thermodenuder experiments we deduced that the portion of volatile (at 125 �°C) and semi-volatile (at 250 �°C) particles which could be both associated with biogenic sulfur aerosol, was maximum during austral summer, while during winter non-volatile sea salt particles dominated. During September through April we could frequently observe enhanced concentrations of ultrafine particles within the nucleation mode (between 3 nm and 7 nm particle diameter), preferentially in the afternoon.

Document Type:Article
Title:Characterization of the inter-annual, seasonal, and diurnal variations of condensation particle concentrations at Neumayer, Antarctica
Authors:
AuthorsInstitution or Email of Authors
Weller, RolfAWI Bremerhaven
Minikin, AndreasUNSPECIFIED
Wagenbach, DietmarUniv. Heidelberg, Heidelberg
Dreiling, VolkerUniv. Mainz, Mainz
Date:21 December 2011
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:11
DOI:10.5194/acp-11-13243-2011
Page Range:pp. 13243-13257
Status:Published
Keywords:aerosol, Neumayer, condensation particles, non-volatile particles
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Dr.rer.nat. Andreas Minikin
Deposited On:29 Dec 2011 14:02
Last Modified:12 Dec 2013 21:31

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